/ Dictionary / Index B beauty sleep: Meaning and Definition of Find definitions for: beau'ty sleep" Pronunciation: [key] — Informal. Informal. sleep before midnight, assumed to be necessary for one's beauty. any extra sleep. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. beauty quark beauty spot Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language